A.pilot charts
B.Notices to Mariners
C.Tide Tables
D.Current Tables
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A.are sheet or layer clouds
B.have undergone great vertical development
C.are middle or high altitude clouds
D.are rain clouds
A.as a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small droplets
B.as winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming clouds
C.dry air compresses moisture from the atmosphere into clouds
D.when the relative humidity of the atmosphere is low
A.high pressure fluid accumulators
B.driving air-powered plunger pumps
C.filling open-circuit breathing systems
D.bladder-type accumulators
A.Sailing Directions
B.Light List
C.List of Private Aids
D.Aids to Navigation Manual
A.radio time signal
B.comparison with a timepiece of known error
C.applying the prevailing chronometer rate to previous readings
D.All of the above
最新試題
Complete information on weather broadcasts throughout the world is contained in（）.
Changing rescuers while carrying out artificial respiration should be done（）.
Day-shapes must be displayed（）.
Deck beams on a ship are generally spaced at equal intervals and run（）.
Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.
Dacron sails，when not in use，may be damaged if（）.
Charts showing the coast of Mexico are produced by the United States（）.
Compliance with the terms of the load line certificate on a ship is the responsibility of the（）.
Considering the general circulation of the atmosphere，the wind system between latitudes 30°N and 60°N is commonly called the（）.
Clean air standards referred to as “Grade D” apply to compressed air for use in（）.